having done a few GSPs* to various countries, that program solves nightmares for me
(no destination deliveries within ebay time limits, damaged items you have to manage,
refused by foreign buyer, lied to by foreign buyer, NAA by foreign buyer, foreign buy
challenges pp/cc for refund and keeps the unit and the money)
in this example not a lot of difference with buyer fixing broken fuse and reselling for 10x
what you got, or fixed it by working the monitor/speaker switches.
unless you get the actual reason (which you won't) treat it as a great closed transaction
(you got your money, and the positive, and absolutely no back-hurling from buyer).
there were many threads from non-US buyer about getting ripped off by the GPS,
I'd tell them china sends stuff from there to here cheaper than local mail and try
the US one-ounce package to Canada for $9).
or if you have the stones, and the cast iron stomach, do ebay and opt-out of GSP
and send something to Italy for example.
I am very happy to use cheaper rates (to Kentucky than airmail priority to anywhere
else) and have it delivered in 2 days (try two heavy output transformer in flat
rate box at about $12), and have a positive on the sale upon delivery.
* by few I mean places like Thailand (with year round 100% humidity in their
postal inspection warehouses), Pakistan (with addresses that confuse me),
and Russia (can't read a single word in Cyrillic).